
Let’s talk about time travel.
When you hear those words, maybe you imagine yourself stepping into a machine, switches flipped, lights flashing, and suddenly you’re somewhere else, somewhen else. We’ve dreamt this dream for generations, not just out of curiosity, but from a deeper place: the ache to change time. Who among us hasn’t wished we could return to an important moment, speak the words left unsaid, or step onto the road not taken?
When I think of time travel, I see myself as a kid sitting with my dad, watching the Back to the Future trilogy. It is one of my most cherished memories. My dad, the sci-fi dreamer, and me, learning early that time is not the simple thing it pretends to be. Those movies planted a question in me that Zen would later answer in ways Hollywood never could.
Beneath our fascination with time machines is a longing to make peace with what has been, and to shape what might yet come. And Zen has its own way of talking about time travel.
Dōgen and Being-Time
Most of us think of time as a container that holds us and all events: past, present, and future. It’s a very dualistic understanding. I live inside of time. It’s separate from me. I move through time the way a passenger moves through a train station, standing still while everything else arrives and departs. But Dōgen looked at that understanding and said, “That’s not it.”
For Dōgen Zenji, time was more than a backdrop. He created a new expression for his realization: Uji, often translated as Being-Time. He invented a new word for his realization: Uji, often translated as Being-Time. It didn’t exist before in Japanese. He combined “being” (u) and “time” (ji) because what he realized was too vast for the language he had inherited. One of his favorite phrases in Uji is “for the time being”:
For the time being stand on top of the highest peak.
For the time being proceed along the bottom of the deepest ocean.
For the time being three heads and eight arms.
For the time being the earth and sky.
It sounds like Dōgen is repeating “be here now,” over and over, but he is also pointing to something deeper. He goes on to explain:
“For the time being” here means time itself is being, and all being is time.
If we stay with this, if we really let it work on us, we notice that Dōgen is not giving us a philosophy. He is describing experience. He is not saying “time and being are conceptually related.” He is saying they are the same thing. You cannot extract the being from time any more than you can extract wetness from water.
And then he writes one of his most startling passages:
Know that in this way there are myriads of forms and hundreds of grasses throughout the entire earth, and yet each grass and each form itself is the entire earth.
This is not metaphor. For Dōgen, each blade of grass, each rock, each breath is the whole universe expressing itself in that particular form. And since each form is nothing other than time, each moment, too, is the whole universe. The whole thing, not a slice of it.
He deepens this later in the same essay:
Each moment is all being, is the entire world. Reflect now whether any being or any world is left out of the present moment.
That question deserves to be sat with for a long time. Is anything left out of the present moment? Your parents’ choices. Your ancestors’ migrations. The light from stars that burned out before the earth cooled. The words you haven’t spoken yet, the places you haven’t been. All of it, Dōgen suggests, is folded into this moment. Not as memory or prediction, but as the very fabric of what this moment is.
Mountains and Oceans Are Time
If mountains and oceans are time, then so are we. Mountains are formed over millions of years: tectonic plates colliding, rock folding and eroding. Without vast stretches of time, a mountain is not a mountain. Similarly, oceans form drop by drop over billions of years. Mountains and oceans are nothing more than time made visible.
Dōgen developed this idea further in his Sansuikyō, or Mountains and Waters Sutra, one of the most astonishing pieces of writing in the entire Zen canon. In it, he quotes the Chinese teacher Furong Daokai: “The green mountains are always walking.”
Mountains walk? It sounds absurd. But Dōgen is characteristically serious:
Mountains do not lack the qualities of mountains. Therefore they always abide in ease and always walk. You should examine in detail this quality of the mountains walking. Mountains’ walking is just like human walking. Accordingly, do not doubt mountains’ walking even though it does not look the same as human walking.
If you have ever revisited a mountain trail after many years and found the rocks shifted, the streambed deeper, the ridge line altered, you have seen a mountain walking. Mountains move at a pace that human beings have difficulty perceiving. But the fact that we cannot perceive a movement does not mean it isn’t happening. And Dōgen adds a sharp turn here:
If you doubt mountains’ walking, you do not know your own walking.
This is vintage Dōgen. He flips the script. The problem isn’t with the mountain. The problem is with the limits of our perception. We think we know what walking is because we do it every day. But do we? Do we know our own passage through time any better than we know the mountain’s?
Later in the same discourse, Dōgen writes about water in ways that break our expectations wide open. Water, he says, does not simply flow downward. It flows in the sky, it rises, it becomes clouds, it moves upward. The path of water is not confined to our assumptions about it. He is relentless in insisting that the forms we think we understand so well contain depths we haven’t begun to encounter.
And this is connected to time. We assume time flows in one direction, from past to future, the way we assume water flows downhill. But our practice invites us to question that, not as a puzzle to solve but as a reality to live in.
The Ocean from the Boat
Elsewhere in the Genjokoan, Dōgen offers a passage that bears directly on our relationship with time:
When you sail out in a boat to the middle of an ocean where no land is in sight, and view the four directions, the ocean looks circular, and does not look any other way. But the ocean is neither round nor square; its features are infinite in variety. It is like a palace. It is like a jewel. It only looks circular as far as you can see at that time. All things are like this.
Read that last line again. All things are like this. Our perception of any given reality is shaped by where we are standing when we look at it. The ocean is not round. It only appears that way from the deck of a small boat. And yet we mistake the appearance for the whole truth.
Time works the same way. From where we stand, time appears to move in a straight line from past to future, the way the ocean appears to be a flat circle from the middle of the water. We build our entire lives around this appearance. We regret the past because we believe it is behind us. We worry about the future because we believe it is ahead of us. We treat the present as a narrow bridge between the two.
But Dōgen is saying that time, like the ocean, has features we cannot see from our current position. It is like a palace. It is like a jewel. Its qualities are, in his word, inexhaustible. The linearity we perceive is real, but it is not the whole picture. Not even close.
He continues:
Though there are many features in the dusty world and the world beyond conditions, you see and understand only what your eye of practice can reach.
This is the key phrase: your eye of practice. What we perceive depends on how deeply we have looked. An untrained eye sees the ocean and concludes it is round. A practiced eye knows better, not because it has learned a theory about the ocean, but because it has sailed further, looked longer, gone deeper. The same is true with time. An untrained mind sees the clock ticking and concludes that time is passing. A practiced mind, one that has sat in zazen, one that has watched thoughts arise and dissolve for hours and years, begins to see something else. It begins to see that what we call “the present moment” contains depths that our ordinary perception cannot reach.
This is not mysticism. It is attention. The ocean really does have more features than a circle. Time really does have more dimensions than a line. We just have to look.
Awareness as Time Travel
My favorite Back to the Future film was always the second one. Marty McFly goes back to 1955 and watches himself moving through the past in the first movie. Wouldn’t it be something if we could all do that? Step outside ourselves and see our choices clearly, objectively?
Of course, we can’t spy on our past selves. But in a real sense, zazen is our time travel. Not to another moment, but into the depths of this one. In zazen, we are not escaping time. In fact the longer we sit, the more we realize that time is not something we’re in, but something we are. Sitting there, breathing, hearing birds, feeling the ache in your knee or the restlessness in your mind: that is time. Not passing through you. Being you.
Shunryu Suzuki once said in a lecture, “This practice is started from beginningless time and it will continue for endless future. Strictly speaking, for human beings there is no other practice than this practice. There is no other way of life than this way of life.”
When Suzuki Roshi talks about practice beginning in “beginningless time,” he is pointing to the same insight that Dōgen encoded in Uji. Our sitting is not something that started when we first crossed our legs on a cushion. It reaches backward through every ancestor who sat, every teacher who transmitted, every being who turned toward awareness. And it reaches forward into every future sitting, every future moment of waking up. Our practice is not confined to the clock.
And the awareness that zazen cultivates is itself remarkable. As far as we know, human beings are the only creatures who can notice the mind noticing. Trees and mountains can’t do it. Even our pets can’t do it. This capacity is rare. It is precious. What we do with it matters.
In the Genjokoan, Dōgen offers one of his most celebrated teachings:
To study the buddha way is to study the self. To study the self is to forget the self. To forget the self is to be actualized by myriad things.
This is a map of what happens in zazen. We begin by turning attention inward: studying the self. But genuine study leads to a loosening of the grip. We forget the self, and in that forgetting, the world rushes in to meet us. We don’t need to travel anywhere. The whole universe arrives.
A Living Example: Whitney Houston and Calum Scott
One of my favorite lines from Uji is: “Each moment is all being, is the entire world. Reflect now whether any being or any world is left out of the present moment.”
I’m going to attempt to offer a simple example of this teaching, which sounds abstract at first, but it points to something deeply rooted in actual experience. Fundamentally, it points to the interdependence of all moments.
In September 2025, Calum Scott released a duet version of “I Wanna Dance With Somebody” with Whitney Houston to mark the fortieth anniversary of Houston’s music career. Whitney recorded her part in 1985. She died over thirteen years ago. Calum recorded his part earlier this year.
I listened to the song a few weeks ago. Whitney’s voice from 1985 came through my headphones, and then Calum Scott’s voice rose up to meet hers. And there I was, sitting in my kitchen in 2025, hearing them together as if they were in the same room. It did not feel like three separate times. It felt like one complete moment.
And there is something else here. Whitney recorded that song with the intention that someone in the future would hear it. Calum Scott did the same almost forty years later. Neither would have walked into the studio without the presence of future listeners shaping their choices.
In a real sense, the future influenced the past. Their intention reached forward. Our listening reaches backward. The moment they created and the moment we live in meet right here.
Dōgen writes something in Uji that speaks directly to this:
Do not think that time merely flies away. Do not see flying away as the only function of time. If time merely flies away, you would be separated from time. The reason you do not clearly understand the time-being is that you think of time only as passing.
We tend to think that 1985 is gone. That Whitney’s voice belongs to the past. But Dōgen insists we not reduce time to mere passage. Whitney’s voice, arriving in our ears right now, is present. It is not a ghost of 1985. It is this moment, fully. Past and future are not somewhere else. They are alive in this moment.
Dōgen continues: “The time-being has the quality of flowing. So-called today flows into tomorrow, today flows into yesterday, yesterday flows into today.” Notice that. Yesterday flows into today, but today also flows into yesterday. Time does not move in one direction only. It interpenetrates. The future shapes the past as surely as the past shapes the future.
The Whole Works
There is a short fascicle of the Shobogenzo called Zenki, which translates roughly as “the whole works” or “total dynamic working.” In it, Dōgen writes that life is the total manifestation of life, and death is the total manifestation of death. Nothing is partial. When you are alive, every fiber of reality is alive. When a moment arrives, every fiber of reality is that moment.
This connects directly to Uji. If each moment is the entire world, then nothing in your experience right now is accidental or incomplete. The sound of traffic outside, the weight of this device in your hands, the slight tension in your shoulders, the fact that you are reading these particular words at this particular second: all of it is the whole works, the entire universe showing up as your life.
In the Shoji fascicle, which deals with birth and death, Dōgen draws a related conclusion:
Just understand that birth-and-death is itself nirvana. There is nothing such as birth and death to be avoided; there is nothing such as nirvana to be sought.
This is as radical as anything in the Buddhist tradition. We do not practice to arrive at some timeless realm beyond the mess of living and dying. We practice to meet this life fully. Birth-and-death, which is to say our ordinary moment-to-moment experience, is not the obstacle. It is the path. It is, in Dōgen’s language, already nirvana.
Science Fiction and Being-Time
Physicists have noticed something similar to what Dōgen describes. In certain quantum experiments, such as one called the delayed-choice quantum eraser, a choice made in the present appears to influence how a particle behaved in the past. Some call it retrocausality: the future rippling backward.
The experiment works by observing entangled particles. When a measurement is made on one particle, it retroactively determines the behavior pattern of its partner, even when the partner’s behavior was recorded earlier. The “choice” of what to measure seems to reach backward through time. Scientists debate furiously what this means. Some say it is a measurement artifact. Others believe it reveals something fundamental about the nature of time itself.
I am not a physicist, and I do not want to overstate the parallel. But it is striking that our most advanced instruments are beginning to glimpse what Dōgen saw through zazen: past, present, and future are not separate things. Each gives rise to the others. The universe is not a sequence of frames playing one after another. It is, as the tradition suggests, one bright pearl.
Dōgen uses that image, ikka myoju, “one bright pearl,” as the title of another fascicle. The whole universe is one bright pearl, he says. Not many pieces. Not past and present and future strung together like beads. One pearl. Whole and luminous.
Ethical Time Travel
Dōgen also writes in Uji:
The way the self arrays itself is the form of the entire world. See each thing in this entire world as a moment of time. Things do not hinder one another, just as moments do not hinder one another.
Because we are time, our choices matter. Each moment is a complete and unique universe. This moment holds our parents, teachers, ancestors, and the dreams we haven’t even dreamt yet. It holds mountains forming and oceans deepening. In fact, this moment is the whole universe arriving as you.
And because it is complete, it carries moral weight. How we show up in this moment is how we show up in the universe. There is nowhere to hide, no future moment where we can deposit the work we’re avoiding now. As Dōgen says, “Vigorously abiding in each moment is the time-being. Do not mistakenly confuse it as nonbeing. Do not forcefully assert it as being.”
The middle way here is striking. We do not deny this moment, and we do not grasp at it. We meet it.
This makes me think of the Jukai and Shukke Tokudo ceremonies, where we say, “Everything is new.” Not symbolically. Literally. This moment has never happened before and will never happen again. The precepts we receive, the robes we put on, the vows we make are not things we collect and store away. They are alive only in the moment of their expression. Practice is not something we did yesterday or will do tomorrow. It is this.
Shunryu Suzuki, in a lecture from December 1965, put it this way: “So whatever we do that is practice. That is Zen.” He was not being loose or casual. He was being precise. If each moment is the total expression of being-time, then there is no moment that falls outside of practice. Cooking breakfast is practice. Tying your shoes is practice. Arguing with your partner is practice. Not because these activities are spiritually elevated, but because they are real. They are the whole works.
The Moon in the Water
Dōgen uses another image in the Genjokoan that deepens everything we’ve been discussing. He writes:
Enlightenment is like the moon reflected on the water. The moon does not get wet, nor is the water broken. Although its light is wide and great, the moon is reflected even in a puddle an inch wide. The whole moon and the entire sky are reflected in dewdrops on the grass, or even in one drop of water.
The moon does not shrink to fit in the dewdrop. The dewdrop does not expand to hold the moon. And yet the whole moon is there. This is Dōgen’s way of talking about how the infinite meets the finite. Each moment of our lives, however small, contains the whole of reality. Not as a reduction, but as a complete expression.
If you are sitting zazen right now and your knee aches, that ache is the whole universe. If you are reading this on a train, the rattling beneath you is the whole universe. Not because these experiences are special, but because nothing is excluded from the present moment.
The moon-in-water image also points to something about our relationship to time. We think we need more time, better time, time we haven’t wasted. But the whole moon is already in the dewdrop. The whole of your life is already in this breath. You cannot add to it by accumulation, and you cannot subtract from it by distraction. You can only meet it or miss it.
The Green Mountains Are Still Walking
There is a passage in Sansuikyo where Dōgen says something that has stayed with me since I first encountered it:
Although mountains belong to the nation, mountains belong to the people who love them.
I love this line because it breaks through any sense that our relationship with the world is abstract or transactional. Mountains belong to those who love them. Time belongs to those who attend to it. The universe belongs to those who show up.
This is not ownership. It is intimacy. When you sit zazen, you are intimate with time. When you walk through a forest, you are intimate with mountains. And that intimacy is itself the practice.
Dōgen goes further. He says that when wise people and sages enter the mountains, “not a single person meets another. There is just the activity of the mountains.” In other words, the distinction between person and mountain dissolves. When you are fully present in a place, you are not separate from it. You are its activity. It is yours.
This is exactly what happens in zazen. We sit, and at first there is a person sitting. But if we stay, if we keep sitting, the person dissolves a little and what remains is just sitting. Just breathing. Just the hum of the room and the light through the window and the faint sound of traffic. Not me sitting in time, but time sitting as me.
Closing
So yes, we are all time travelers. Not like Marty and Doc, not with flux capacitors humming at 88 miles per hour.
We travel through time simply by being alive. Awareness is the vehicle. Not something that transports us elsewhere, but something that reveals where we already are.
Dōgen’s entire project, the thousand pages of the Shobogenzo, the years of sitting and teaching and walking in the mountains of medieval Japan, comes down to this: This moment is the whole thing. Not a fraction. Not a rehearsal. Not a waypoint. The whole thing.
Maybe we don’t need a time machine after all. Maybe our practice is the time machine. When we sit, we touch our entire lives: past, present, future, mountains, oceans, ancestors, and descendants, all right here. The firewood is complete as firewood. The ash is complete as ash. Whitney’s voice is complete in 1985 and complete in your kitchen in 2025. The mountain is walking. The water is flowing upward. The green earth has never stopped its turning.
The real journey doesn’t take us back to 1955 or forward to 2015, where there is a shocking lack of the hover cars we were promised. So for the time being, stand wherever you are: on the highest peak, at the bottom of the deepest ocean, in your kitchen, on the bus, at the dentist’s office, in the zendo.
Be where you are. Where, or when, else could you possibly be?
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